{"id":"CVE-2026-29036","title":"cJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decode_pointer_inplace() function within cJSON_Utils.c that allows unauthenticated attackers to cause JSON Patch operations to tar…","summary":"cJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decode_pointer_inplace() function within cJSON_Utils.c that allows unauthenticated attackers to cause JSON Patch operations to tar…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-706"],"published":"2026-08-11","updated":"2026-09-24","sourceUpdated":"2026-09-24T20:30:25.373","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-29036","references":[{"url":"https://github.com/DaveGamble/cJSON","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/cjson-wrong-key-modification-via-json-pointer-escape-decoding","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00444,"epssPercentile":0.3585,"ingestedAt":"2026-09-24T20:51:40.196Z","slug":"CVE-2026-29036","body":"## Overview\n\ncJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decode_pointer_inplace() function within cJSON_Utils.c that allows unauthenticated attackers to cause JSON Patch operations to target wrong object keys by supplying crafted JSON Pointer escape sequences (~0 or ~1) in patch paths. Attackers can submit malicious RFC 6902 JSON Patch input to applications using cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive() to silently corrupt data or delete unintended keys, potentially bypassing authorization controls in applications that rely on JSON Patch for access-controlled data modification.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}